[quote=Dinh AaronMk]
The demographic changes you're probably looking at are a reflection of Stalinist policies to moving massive groups of people they don't like - either ethnically of politically - to somewhere out of the way.
[/quote]

It was the Russian Empire that first introduced European settlement to Central Asia, not the Soviets. I would understand that there'd be little Ukrainians or Germans, but Russians would still be a significant minority provided they weren't all run off to the last man during the revolution. What I meant by the demographics of the region is that the Uzbeks, not the Kazakhs, are the most populous of the Turkic peoples in the area. No group represents a majority, or even comes close. Turkestan would be the best name, but even that excludes the Iranian Tajiks and the dozens of tiny minorities like the Kurds that came through with the Persians, or the Tatars that were introduced alongside the Russians (as well as existing in the area before the Russian Empire existed).

Central Asia is far from being homogeneous in any which way.